Basic controller about mininet-wifi

[ramonfontes]

The warning is due the number of devices connected to the same port (AP's port). But it works fine. Please see: https://m.youtube.com/watch?v=2FjAS8g5Bsk

…

Sent from my android On 31 Aug 2017 09:34, "hamzehmohammadnia" <[email protected]> wrote: Hi, Hi, There is an issue when using l2_learning pox controller. lots of warning messages pops up on the controller screen when use mininet --wifi. While using the same controller of pox with mininet (using mininet vm iso of virtual machine) shows no error and seems all fine. The issues point at DNS.py and IPv6.py files of packets in pox controller. Are you sure it properly works with simple controller? while runnig ./pox.py forwarding.l2_learning and running: mn --wifi .... --controller remote INFO:packet:(ipv6) warning IP packet data incomplete (114 of 229) INFO:packet:(dns) parsing answers: next_rr: data truncated Best, — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#102 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmejBDoUWPxUurm_pPB5BqF_c5X5t2ks5sdqhCgaJpZM4PCufd> .

[ramonfontes]

The best reference is (always) the source code page of the tool you want to work. Please refer to the Mininet-WiFi's source code repository.

…

Sent from my android

On 2 Sep 2017 18:20, "hamzehmohammadnia" ***@***.***> wrote: I have followed this [1] which was pretty easy and straight forward to install mininet-wifi. [1] http://www.brianlinkletter.com/mininet-wifi-software- defined-network-emulator-supports-wifi-networks/ — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#102 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmen7n5EHt5XggyVXeoymKHJr7q9aKks5seca4gaJpZM4PCufd> .

[ramonfontes]

*Hello,* 2017-08-25 11:21 GMT-03:00 hamzehmohammadnia <[email protected]>:

Hi @ramonfontes <https://github.com/ramonfontes> , I had some thoughts through working with Mininet-wifi, with holding your description about: a) If need to add a remote controller it needs to handle mobility or do it manually b). current mininet-wifi is working with reference controller (default controller) Now I have two questions: is the reference controller defined in node.py at line number 2278: class Controller(Node)?

*It's defined from the OpenFlow reference implementation (ovs-testcontroller). *

As you said earlier, the reference controller that is used for mininet in default is from mininet, right? then if I change the option parameter of --controller=remote controller and run https://github.com/itaimirin/SDN-Controller---Mininet-POX-/ blob/master/IM_l2_learning.py it will work properly?

*It won't work only when flows 'come from and go to' the same interface. For example:* *sta1 --- (wlan1) ap1 (wlan1) --- sta2* (here you might using capwap instead of openflow) *It will work for the rest. For example:* *sta1 -- ap1 --- ap2 --- sta2 * *sta1 -- ap1 -- s1 --- h1* *sta1 -- ap1 -- s1 --- ap2 --- sta2* *and so on...* and last but not least, since you mentioned this is a wireless station

(access point) that acts like a switch, and since when I traced controller on wireshark I have seen Port_in and Port_out flows, how controller setups rules on the access points (ovs switch) ? cuz there is no port to setup rules on it...

*There is the wlan interface (port number 1 by default).*

…

Thank you in advance, Best, — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#102>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmeo_uuWIa2E6giXJ-F3Od4W_FPE3oks5sbthigaJpZM4PCufd> .

[hamzehmohammadnia]

Hi @ramonfontes ,
There is an issue when using l2_learning pox controller. lots of warning messages pops up on the controller screen when use mininet --wifi. While using the same controller of pox with mininet (using mininet vm iso of virtual machine) shows no error and seems all fine (only on mininet).
The issues (during using mininet-wifi) point at DNS.py and IPv6.py files of packets in pox controller. I dunno why it doesn work properly..

while runnig ./pox.py forwarding.l2_learning and running: mn --wifi .... --controller remote
INFO:packet:(ipv6) warning IP packet data incomplete (114 of 229)
INFO:packet:(dns) parsing answers: next_rr: data truncated

Best,

[hamzehmohammadnia]

Thanks,
I have checked with this topology:
sta1 -- ap1 --- ap2 --- sta2
but will check with your example code (raduis).
Best,

[hamzehmohammadnia]

Hi,
After testing your Radius topology with "sudo mn --wifi --topo radius.py --controller remote " command, it started to work and also no error showed up on the controller screen. (i hope the way of used topology would be fine)
But within topology, I found a parameter that called "radius_passwd" in [1], at line 16 and 17. I was wondering since these two mobile stations are connected to the same access point, then why they use different wifi password? did I understood radius_passwd parameter correctly?

Best,

[1] https://github.com/intrig-unicamp/mininet-wifi/blob/master/examples/radius/radiusCode.py

[ramonfontes]

There is nothing special about using different usernames/passwords. You can use the same username/passwd if you want. You just have to take care about the radius configuration file and where you are running it. By default, when there is no radius server ip it assumes 127.0.0.1 (e.g. radius_server='127.0.0.1'). So, if there is only one AP and you have only one radius server, all stations should be associated to the same AP (if username/passwd are correct, of course). BTW, you can use iw/iwconfig if you want to verify associations. 2017-09-02 14:03 GMT-03:00 hamzehmohammadnia <[email protected]>:

…

Hi, After testing your Radius topology with "sudo mn --wifi --topo radius.py --controller remote " command, it started to work and also no error showed up on the controller screen. (i hope the way of used topology would be fine) But within topology, I found a parameter that called "radius_passwd" in [1], at line 6 and 7. I was wondering since these two mobile stations are connected to the same access point, then why they use different wifi password? did I understood radius_passwd parameter correctly? Best, [1] https://github.com/intrig-unicamp/mininet-wifi/blob/ master/examples/radius/radiusCode.py — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#102 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmenx_mT-U8zPRKg9QdcgMoOJIUrJKks5seYpjgaJpZM4PCufd> .

[hamzehmohammadnia]

Im facing with a weird error of not being able to import mininet modules.
~/mininet-wifi/examples$ sudo python radius/radiusCode.py
Traceback (most recent call last):
File "radius/radiusCode.py", line 5, in
from mininet.net import Mininet
ImportError: No module named mininet.net

or when

:~/mininet-wifi/examples/radius$ sudo ./radiusCode.py
*** Creating nodes
*** Configuring Propagation Model
*** Configuring wifi nodes
*** Associating Stations
Associating sta1-wlan0 to ap1
Associating sta2-wlan0 to ap1
*** Starting network
Traceback (most recent call last):
File "./radiusCode.py", line 47, in
topology()
File "./radiusCode.py", line 32, in topology
net.build()
File "/usr/local/lib/python2.7/dist-packages/mininet-2.1.post2-py2.7.egg/mininet/net.py", line 923, in build
mininetWiFi.configureWmediumd(self.stations, self.accessPoints)
File "/usr/local/lib/python2.7/dist-packages/mininet-2.1.post2-py2.7.egg/mininet/wifiNet.py", line 656, in configureWmediumd
WmediumdStarter.start()
File "/usr/local/lib/python2.7/dist-packages/mininet-2.1.post2-py2.7.egg/mininet/wmediumdConnector.py", line 434, in start
stderr=subprocess.STDOUT, preexec_fn=os.setpgrp)
File "/usr/lib/python2.7/subprocess.py", line 711, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory

Im runnig this to test your raduis topology and pox controller.
I have tried it with mininet vm image and tested a customized topology but didnt face the same error as I see on mininet-wifi vm. According to you instruction I didnt see any specific python package installation, except apt-get updating after a fresh ubuntu installation

Best,

[ramonfontes]

Are you sure you are using our VM? I don't think so. You would never get such error. Specially the first one.

…

Sent from my android On 2 Sep 2017 17:44, "hamzehmohammadnia" <[email protected]> wrote: Im facing with a weird error of not being able to import mininet modules. ~/mininet-wifi/examples$ sudo python radius/radiusCode.py Traceback (most recent call last): File "radius/radiusCode.py", line 5, in from mininet.net import Mininet ImportError: No module named mininet.net or when :~/mininet-wifi/examples/radius$ sudo ./radiusCode.py *** Creating nodes *** Configuring Propagation Model *** Configuring wifi nodes *** Associating Stations Associating sta1-wlan0 to ap1 Associating sta2-wlan0 to ap1 *** Starting network Traceback (most recent call last): File "./radiusCode.py", line 47, in topology() File "./radiusCode.py", line 32, in topology net.build() File "/usr/local/lib/python2.7/dist-packages/mininet-2.1.post2-py2.7.egg/mininet/net.py", line 923, in build mininetWiFi.configureWmediumd(self.stations, self.accessPoints) File "/usr/local/lib/python2.7/dist-packages/mininet-2.1.post2-py2.7.egg/mininet/wifiNet.py", line 656, in configureWmediumd WmediumdStarter.start() File "/usr/local/lib/python2.7/dist-packages/mininet-2.1.post2- py2.7.egg/mininet/wmediumdConnector.py", line 434, in start stderr=subprocess.STDOUT, preexec_fn=os.setpgrp) File "/usr/lib/python2.7/subprocess.py", line 711, in *init* errread, errwrite) File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child raise child_exception OSError: [Errno 2] No such file or directory Im runnig this to test your raduis topology and pox controller. I have tried it with mininet vm image and tested a customized topology but didnt face the same error as I see on mininet-wifi vm. According to you instruction I didnt see any specific python package installation, except apt-get updating after a fresh ubuntu installation Best, — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#102 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmepNZedPFzBVaMCw_iipGlVjULfXdks5seb4ygaJpZM4PCufd> .

[hamzehmohammadnia]

I have followed this [1] which was pretty easy and straight forward to install mininet-wifi. But now going to use your pre-configured vm machine.

[1] http://www.brianlinkletter.com/mininet-wifi-software-defined-network-emulator-supports-wifi-networks/